Accession Number : AD0665706

Title :   ABOUT CERTAIN POSSIBILITIES OF A MODEL OF RADIOACTIVE ANALYSIS OF ESPECIALLY CLEAN SUBSTANCES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Maslov,I. A. ; Obukhov,A. P.

Report Date : 18 AUG 1967

Pagination or Media Count : 11

Abstract : The development of highly sensitive methods (10 to the -6th power to 10 to the -10th power %) of determining impurities by means of neutron activation encounters considerable difficulties in evaluating the sensitivity and accuracy of the analytical method employed. The authors therefore simulated the process of radioactivation analysis of high-purity substances. In their statistical treatment of the problem, the authors make use of the fact that the relative error of reproducibility of the analysis is independent of the purity of the sample and of the kind of element being determined. A physical model of radioactivation analysis was obtained for materials of high purity such as silicon, quartz glass, water, carbon, sulfur, etc., weakly activated by neutrons or producing mainly isotopes of gamma emitters after irradiation. Results of a study of direct gamma-spectroscopic activation analysis of high-purity silicon by means of the method of models are given.

Descriptors :   (*RADIOACTIVATION ANALYSIS, MATHEMATICAL MODELS), (*GAMMA RAY SPECTROSCOPY, SILICON), IMPURITIES, ACCURACY, NEUTRON ACTIVATION, STANDARDS, SAMPLING, USSR

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE